Machine for milling, facing, and other metal-cutting operations.



A W. A. 8: F. PEARN. MACHINE FGR MILLING, FAGING, AND OTHER METALCUTTING OPERATIONS.

' APPLICATION FILED JUNE 20, 1908.

941,269. Patented Nov. 23, 1909.

8 SHEETS-SHEET 1 Attas t. I [n/venfors.

- 9 I WL'lI/mm/AI/fr dfeam Flg'I I Fra/mkl mrm WW. wam% Attyk.

. 7 MW ulu! cm momma. WWW!" n. c.

W. A. & F. PBARN. MACHINE FOR MILLING, FACING, AND OTHER METAL CUTTINGOPERATIONS.

- APPLICATION TILED JUNE 2Q, 1908.

mm. m r m mm .m wwfi 3 4 d w W 2 W W t mm .s n k A Nw m U Fig.2

"NEW. 0. ml 00; Imm-mmm vlAsmuc'mu. n c

W. A. & F. PEARN.

MACHINE FOB. MILLING, meme, AND OTHER METAL CUTTING OPERATIONS.

APPLICATION FILED JUNE 20, 1908.

Patented Nov. 23, 1909.

6 SHEETS-SHEET 3.

Attcst. [liven/firs. flaw. WilliamA lf'red 350.1%

. ram/1C Paarn. by %M W W% Attyii Lnnkzw. a. GRAHAM 00., Pnmc-urmmvnsas.msmum'un. n. c-

W. A. & F. PEARN. MACHINE FOR MILLING, FACING, AND OTHER METAL GUT'I INGOPERATIONS.

APPLICATION FILED JUNE 20, 1908.

m m wn W 4 an 8 VJ mi: PM u mm d m? A Nu m k m [A m w ,a m u W 4 W F W Mw k 1 t 4 JL 9 A M co Pnmmmmemrnzas wnsmncmu. n. c.

W; A, & F. PEARN. MACHINE FOR MILLING, FAGING, AND OTHER METAL CUTTINGOPERATIONS. APPLICATION-FILED JUNE 20, 1908. 941,269. Patented Nov. 23,1909.

6 SHEETBSHEET 5.

AI /test Inventors.

Wz' LLL'am 14 Fred 1 661171;

1 1mm Pea/r114 Atty is.

W. A. & F. PEARN.

MACHINE FOR MILLING, FAGING, AND OTHER METAL CUTTING OPERATIONS.APPLICATION FILED JUNE 20, 1908.

941,269. Patentd Nov. 23, 1909.

6 SHEETS-SHEET 6.

Fig.6 I

Attzsi: fnvenlprs;

' WLzmmAzfMPa r I M Frank Pmr'm' by w 'Attyfs munsw. s. (mum on.Pnmmumncwwnus, msmnsron. n c

UNITED STATES PATENT OFFICE.

WILLIAM ALFRED PEARN AND FRANK PEABN, OE VEST GORTON, MANCHESTER,ENGLAND.

MACHINE FOR MILLING, FACING, AND OTHER METAL-CUTTING OPERATIONS.

eanaee.

To all whom it may concern:

Be it known that we, WVILLIAM ALFRED PEARN and FRANK PEARN, subjects ofthe King of Great Britain and Ireland, residing at lVest Gorton,Manchester, England, have invented certain new and useful Improvementsin Machines for Willing, Facing, and other Metal-Cutting Operations, ofwhich the following is a specification.

This invention relates to machines for milling, facing, boring, drillingand other metal cutting operations, our object being to improve theconstruction of such machines and render the same more effective forservice, and capable of being more readily set or adjusted for theperformance of the required operations on work pieces of variousdimensions.

Iteferring to the six accompanying sheets of explanatory drawings:Figure 1 is a side elevation (with part in section) and Fig. 2 an endelevation of one of our im proved machines. Fig. 8 is a sectional planthrough the cutter head. Fig. 4 is a sectional side elevation, Fig. 5 asectional end elevation and Fig. 6 a sectional plan showing themechanism for obtaining rapid movements of the work table and also thevertical movements of the cutter head. Figs. 1 and 2 are drawn to asmaller scale than the remaining figures; Fig. 3 is drawn to a largerscale than Figs. 4 and 5.

The same reference characters in the dif ferent views indicate the sameparts.

In the construction of a machine in accordance with our invention and asillustrated in the drawings, we secure to the operative end of themandrel or main spindle a of the vertically sliding head-stock or cutterhead, a toothed wheel 1) into which meshes a driving pinion 0 formedwith or carried by the back gear spindle (Z of the said sliding head.The aforesaid toothed wheel 5 is adapted to enter into socket and spigotor other detachable connection with the facing or other tool holder as cthat may be employed, according to the particular process or operationto be performed by the machine. The required tool holder can thus bereadily connected and disconnected with the spur or toothed wheel I),and it is detachably secured thereto by bolts, screw studs as f orotherwise.

The driving pulley g of the mandrel or main spindle a of the slidinghead is fixed Specification of Letters Patent.

Application filed June 20, 1908.

Patented Nov. 23, 1909.

Serial No. 439,602.

as is shown, to the portion of the said spindle between the bearingsformed in the head, and by disposing belt guide pulleys as h and 21respectively above and below the said driving pulley g a good arc ofbelt driving contactis obtained on the said pulley in a coinpact andconvenient manner.

In the particular machine illustrated three speed changes are providedfor on the sliding head itself. For one speed the main spindle a isdriven directly from the driving pulley g mounted thereon, the back gearspindle (Z being then inoperative. The necessary direct drivingconnection between the spindle a and pulley g is obtained through thecarrier element 9 which carries a spring bolt 9 adapted to detachablyengage one of a number of apertures formed around the web of g. Anotherspeedis obtained by the indirect driving of the spindle a, from thepulley g by way of the gear wheels 7' and 7c and the aforesaid gears band c. A third speed is obtained by disengaging the wheels j and 7c andengaging the wheels Z and m. The said engagement and disengagement ofthe respective gears is effected in any convenient and well knownmanner, such as by sliding the wheels 72 and Z to gether along thespindle d.

In the illustration at Fig. 3 the back gear spindle d and its gearwheels are shown by dotted lines at one side of the main spindle a; thetrue position of the said spindle d is above the spindle a as is shownat Figs. 1 and 2. The change speed driving mechanism at the base of themachine may, as in the example illustrated, comprise an all gear drive;or instead of such a drive speed cones may be employed in combinationwith single or other reduction gear. lVith the all gear drive therequired speed changes are effected preferably by sliding the gearwheels along their respective shafts or spindles; or the wheels may beconstantly in mesh and rendered operative or inoperative as required bysliding or other clutches. The belt n employed to transmit from the gearat the base of the machine to the driving pulley g afore said on themandrel a of the sliding head, serves also to absorb or take up anychatterings or vibratory movements which might otherwise be conveyedfrom the said speed changing mechanism to the driving pulley g.

For readily and conveniently effecting rapid movements of the work tableboth in longitudinal and crosswise directions, and also like verticalmovements of the sliding head, we provide power or self-acting mechanismwhich is preferably adapted to be put in and out of action by means of ahand lever as 0. Such quick feed mechanism comprises sliding or clutchcontrolled bevel wheels as 7) p arranged to transmit the required motionto the feed spindles, leading screws or equivalent elements of the worktable and the vertically sliding head. The said bevel wheels are drivenfrom the driving or first motion shaft 9 at the base of the machinethrough the medium of a belt 9. By the said belt the bevel pinion shaftg is kept constantly rotating while the machine is running, but by meansof the clutch operated by the aforesaid hand lever 0 acting through therock shaft 0 either the bevel pinion p or the bevel pinion 7) may be putinto operative connection with the shaft Q2 according to the directionin which it is required to rotate the bevel wheel 79 for effecting therapid movements aforesaid. On placing the clutch 1" in its mid positionno motion is imparted to 79 Finer or slower feed movements of the worktable and the sliding head are obtained through the operation of asingle hand wheel 8 arranged with any suitable and ordinary clutchdevices for putting the said wheel into driving connection with therequired transmitting elements which transmit either the self-acting orthe hand driven feed movements in the following manner:

The hand wheel .9 is fixed upon a sliding sleeve t revoluble on thespindle 2, (Fig. 5) and having formed with or secured to it the spurwheel a gearing with the wheel o secured to the spindle w to which isfixed the aforesaid bevel wheel p Upon the same spindle w the wheels mand 3/ are freely mounted and between them is disposed a double endedsliding clutch 2 revoluble with the said spindle. The wheel 00 gearswith a wheel Z rotatable with a spiral gear actuating the feed screwshafts 1 1 of the work tables. The wheel 2 gears with the wheel 2 fixedupon the spindle t which transmits motion by means of bevel wheels tothe feed screw shaft 2 of the vertical sliding head. Thus when theclutch z is engaged with the wheel 1, and the hand lever 0 (controllingbevel gear clutch r) operated, motion is antomatically imparted to thevertical head, and when the clutch z is engaged with the wheel 00,motion is similarly imparted to the work table 3. The said motions arevariable in direction by means of the clutch r between the bevel wheelsor pinions j) 7).

lVhen the hand lever 0 and the clutch r operated thereby are inmid-position the spindle 10 receives no motion from the bevel gears 797) 79 forming part of the automatic or power feed mechanism but is freeto revolve under the action of the hand wheel 8, from which motion istransmitted by means of the aforesaid gear wheels or and 11. Thus byvarying the position of clutch 2 as before described, motion may beimparted to the vertical sliding head or the work tables at will, eitherby means of the hand wheel 8 or by power transmitted through the belt p.)Vhen the aforesaid power feed is in operation, the hand wheel 8 may bewithdrawn by sliding it upon the shaft 6, together wit-h the gear wheelit, thus removing the objection and danger of a rapidly revolvingprojecting piece. The hand wheel 8 and the gear wheel a are retained intheir service and out of service positions respectively, by means of aspring catch pin or the like formed in the guard s and adapted to entheopposite ends of a shoulder formed on the sliding sleeve to which thehand wheel is fixed. When either the hand or power feed motionsaforesaid are employed, the self-acting graduated speeds (obtained bydriving down from the main spindle a of the sliding head as hereinafterdescribed) are thrown out of gear by means of the outer clutch to at theouter end of the shaft to.

From the shafts l 1 and 2 the required motions of the work table 3 andalso of the vertically sliding head or head-stock are obtained throughany ordinarily arranged gearing. 7

Instead of driving the shaft to in the manner aforesaid, it may bedriven (when varying or graduated rates of feed are required), by meansof the worm 4t engaging the worm wheel 5 (Fig. 5) mounted upon 20 andadapted to be clutched thereto as required by the outer clutch to. Thesaid worm 4 is secured to a spindle 6 (Fig. 1) which is driven from thegear box 7 (Figs. 1 and 2) to which motion is transmitted down from thespindle a of the sliding head by the skew gear driven vertical spindle 8(Figs. 1, 2 and 3).

The respective motions or driving mechanisms of the complete machine arecontrolled by suitably arranged clutches or their equivalent.

Having thus described our invention what we claim as new and desire tosecure by Let ters Patent is 1. In machines for milling and other metalcutting operations, the combination with a mandrel and a verticallymovable headstock supporting said mandrel, of a toothed wheel secured tothe operative end of said mandrel, a tool holder in direct engagementwith said toothed wheel, means for detachably securing the said toolholder to the toothed wheel, reduction gear engaging the toothed wheel,a belt pulley,

and neans for driving the mandrel from the pulley both directly throughthe said re- 1 duction gear and toothed wheel, as set forth.

2. In machines for milling and other I both directly and through thesaid reduction metal cutting operations, the combination gear andtoothed Wheel, a work table, and consisting of a mandrel, a verticallymovable means for moving the said table relatively to head-stocksupporting the said mandrel, a the said tool holder, as set forth. 15 5toothed \vneel secured to the operative end In testimony whereof, Weaiiix our signaof said mandrel, a tool holder in direct entures inpresence of tWo Witnesses. gagement with said toothed Wheel, meansWILLIAM ALFRED PEARN. for detachably securing the said tool holder FRANKPEARN. to the toothed Wheel, reduction gear engag- Witnesses: 10 ing thetoothed wheel, a belt pulley, means VIVIAN ARTHUR HUGHES,

for driving the mandrel from the said pulley CHARLES CONRAD.

